PDIC's leadership level that is equivalent to divemaster is termed dive supervisor. The training for PDIC dive supervisors, SSI dive cons, PADI and NAUI divemasters, and the like from the other agencies is basically similar. The important skills that are learned at this level of leadership primarily concern safety. You are really being trained to be an underwater lifeguard. Courses alone do not produce good diving leaders at this level. Good instructors and good courses certainly start divers entering these levels off on the right foot... or fin? But, only through experience will one really learn the public relations skills, educational skills, attention to detail, awareness, the ability to think like a lifeguard for problem recognition and prevention, group control, the ability to think like a lawyer to cover your butt and that of your employer, and the ability to win the hearts and minds of the customers. So, rather than look at brand XYZ versus brand ABC, at this crucial level of a diver's education what really matters is how much time will a prospective dive leader get working with divers at all levels. If you want to be a NAUI instructor experience will be the best teacher. Will you get more experience if you take a dive supervisor course from the PDIC shop and then are able to help with classes at all levels because the shop is conveniently close? As was said, what do you think of the instructors? As the saying goes, "It's the instructor not the agency." Who will give you the most for your time and energy and who will expose you to the greatest diversity of courses from entry level to advanced, specialties, tech, pro courses, etc? Cross agency training also builds respect for what the other brands offer. Dive leaders who have been affiliated with different agencies often treat customers as equals rather than just being pro team or brand and makes divers feel more welcome at a shop or resort no matter what card they carry. This is your time to be mentored, work hard and reap the rewards of the experience that comes with leading, coaching and looking out for the well-being of others, getting time at a shop servicing equipment, learning the ropes, and all that jazz so that when you don your instructor shirt no matter what agency you teach through you will be producing students we can all thank you for training.
